This patch change the structure and make it more sense
* Remove dev doc in tab Docs, and for now you could only see it in
history-version page
* Move PyDolphinScheduler from tab DOCS to sidebar and combine with open
API
* Move installation after Functions
* Move data quality after HOW-TOS
* [doc] Migrate dev doc from website repository
* Correct release language
* Fix license issue
* Add all images from website
* Delete unused images
* Add CI
* Fix ci
* fix ci
* Remove no need file
* Add latest commit from website
* correct img_utils.py script
* Remove unused imgs